These are a must. Manufacturers should use these factory!I have NEVER had such an easy time flushing/bleeding my system, and ending up with the BEST feeling brakes since I've owned the bke.A must for anyone who maintais their own bike!

These worked as advertised. Simply installation. Open the valve by about a 1/2 turn and start pumping the brakes slowly. No longer a 2 man job. When finished, just snug them up good, do not overtighten and you are good to go.

They should make this standard issues on all Harleys, takes the work and mess out of Bleeding brakes not to mention now a one person job. Best thing since sliced bread. Will be ordering for my sons 2011 SG. Good price and super fast delivery. Thanks DK.

No, just remove old ones and install new ones, FYI old bleeder caps won't fit on new bleeders! Also, my install was for an 07 Electra glide, did not have o-ring, I would assume that if O-Rings were required new ones would be included for your application!

I'm not aware of any O-ring in the design of the bleeder system on any type of motorcycle/automobile. Therefore I am curious as to what you are referring to and am slightly concerned as to your safety related to the proper function of your brakes.